OPERATION MANUAL
pH CONTROLLER
Please read the attached instructions carefully
before use.
FRONT PANEL DESCRIPTION
1) Display
6) pH / SET function switch
2) pH7 calibrate adjustment knob
7) HI / LO action function switch
3) pH4 calibrate adjustment knob
8) Electrode BNC input terminal
4) SET Adjustment knob
9) Control output socket
5) Indicator of output in action
10) AC power plug
OPERATING (CALIBRATION)
1) Connecting AC power supply.
2) Connecting the pH electrode into the pH input terminal socket.
3) Turn the pH/SET switch to "pH" position.
4) Put the pH electrode into the standard buffer solution pH7.00. Waiting a few
seconds for stable reading and adjust the "pH7" knob until the display
reading is exact on 7.00. Then take away the pH electrode from buffer
solution, and clean the electrode with distilled water.
5) Put the pH electrode into the standard buffer solution pH4.01, Waiting for a
few seconds for stable reading and adjust the "pH4" knob until the display
reading is exact on the buffer 4.01. (You also can calibrate pH10.00 by
using the buffer solution pH10.00 instead of pH4.00 buffer solution.)
(Make sure the step 4 to 5 are carried out when use a new pH
electrode.)
6) After calibrating the pH electrode, put the electrode into the water of tank.
Turn the pH/SET function switch to “SET” position to adjust the setting point.
7) Adjust the "SET" knob until the display reading exact meet your requirement.
Slide the pH/SET function switch to "pH" position for measuring. (Slide the HI/LO
switch to "HI" position will switch on the output control when pH measuring value
goes above the setting value. Slide the HI/LO switch to "LO" position will switch
on the output control when pH measuring value goes below the set value.)
CLEANING AND MAINTENANCE
1) The immersed level for electrode should not be higher than the electrode
cap. (When use the refillable electrode, the level should be lower than
filling open to avoid the water entering into the open and cause damage.)
It had better cleaning the pH electrode sensor with soft brush and
calibrating the pH electrode every 2-3 weeks to keep the test accuracy.
Please keep the electrode in the storage bottle with 3M KCL buffer (or
standard buffer solution pH4.0) solution, the crystallization is normal for
the keeping.
2) pH electrode is accurate glass product, please do not knock it, and do not
use finger, cloth and alcohol to clean it to avoid the damage.
3) There is protection "dead band" which will delay to switch on output control
when the pH measuring value goes above 3-5 digits of the set value. The
output control will switch off when the pH measuring value goes below 3-5
digits of the set value. (HI/LO switch in "HI" position.)
4) The output control will automatically turned off when slide the pH/SET
function is switched in "SET" position to adjust the setting valve.
5) Indoor uses only.
GENERAL SPECIFICATION
Power Supply
: AC100V - AC240V 50/60 Hz
Power Consumption
: Approx. 2 watts.
Display :
0.56"
LED.
Measurement
: 0 to 14 pH
Resolution :
0.01
pH.
Accuracy at 25°C
: ±(0.1%+ 2 digits) after calibrating.
Impedance :
10
12
ohms.
Calibration Knob
: External pH7 (CAL.) & pH4/10 (SLOPE).
Relay Contact
: 5A for power supply voltage
Control Range
: 3.5 to 10.5 pH
Control Output Voltage
: Same as plug in AC voltage.
Temperature : 0 to 50°C (32 to 122°F).
Operating Humidity
: Max. 90% RH.
Dimension : 150 x 85 x 40 mm (5.9 x 3.4 x 1.6 inch).
WHY SHOULD WE KNOW pH RANGE
pH value shows the acid or alkaline state of water (pH value equals 7
is neutral, it is alkaline as pH value is greater than 7, and acid as pH
value is less than 7), most of the fish can adapt to life in water around
pH =7, but many species have special water preferences.
Such as:
species of pH < 7: Discus, Amazon cardinals, preferences for
pH=6.0 to 6.5.
species of pH
＞
7: Marine fish preferences for pH
＝
8.4 and
African cichlids preferences for pH 7.5 to 8.0
。
※
THE RIGHT pH RANGE KEEP THE FISH RIGHT
！
WHAT TO DO AS pH RANGE IS TOO LOW
The pH range of water should be shifted up, the methods of
adjustment you can take: Use coral gravels substrate, anion
exchange resin, add additives of powder, solution or tablets which
can shift pH
、
KH and GH range up.
WHAT TO DO AS pH RANGE IS TOO HIGH
The pH range in water should be shifted down, the methods of
adjustment you can take: Use weak-acid gravels substrate, cation
exchange resin and higher portion of reverse osmosis water. Add
additives of powder or solution which can shift pH range down.
Made in Taiwan
